code: def test_sfo_update_sailfish():
      search_space = search.SearchSpace(
          n_agents=10,
          n_variables=3,
          lower_bound=[0, 0, 0],
          upper_bound=[10, 10, 10],
      )
  
      new_sfo = sfo.SFO()
      new_sfo.compile(search_space)
  
      position = new_sfo._update_sailfish(
          search_space.agents[0],
          search_space.best_agent,
          search_space.agents[0],
          0.5,
      )
  
      assert position[0][0] != 0
  
file_path: opytimizer/tests/opytimizer/optimizers/swarm/test_sfo.py
imports: import numpy
  from opytimizer.optimizers.swarm import sfo
  from opytimizer.spaces import search
label_desc: Use image node_id 6 for calling a global function with example usage: test_sfo_update_sailfish() without return types